InMotion SPK550 Wheel Hub - Front or Rear

Wheel Hub for Mazda, Ford, and Mercury Applications

The InMotion SPK550 wheel hub is a direct replacement hub assembly engineered from OE data and measurements for accurate fitment, stable performance, and long service life. It is built for specific front and rear applications across Mazda Miata, Protege, MX-3, 323, Ford Escort, and Mercury Tracer models.

Fits 1999-2005 Mazda Miata, rear; Fits 1992-2003 Mazda Protege, front; Fits 1990 Mazda Protege, front; Fits 1991-2002 Ford Escort, front; Fits 1991-1999 Mercury Tracer, front; Fits 1990-1997 Mazda Miata, rear; Fits 1992-1995 Mazda MX-3, front; Fits 1990-1994 Mazda 323, front; Fits 1991 Mazda Protege, rear.

• OE-style wheel hub replacement for front and rear driveline applications
• Precision manufactured using modern production methods and strict quality control
• Designed for direct replacement on listed Mazda, Ford, and Mercury vehicles
• Axle nut note varies by application: M22x1.5 included on most listings; M18x1.5 not included on 1990-1997 Mazda Miata rear
• Part number SPK550 for catalog and fitment lookup

Detailed Fitment and Function

The InMotion SPK550 is a wheel hub assembly for drivers servicing worn hub components on Mazda Miata, Mazda Protege, Mazda MX-3, Mazda 323, Ford Escort, and Mercury Tracer platforms. It is engineered to match original part dimensions so the hub installs to the designated application and supports proper wheel mounting and driveline operation. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Problems This Hub Can Address

• Wheel play or looseness at the hub
• Noise from a worn front or rear hub assembly
• Uneven wheel mounting caused by hub wear
• Service replacement after hub damage or corrosion
• Fitment issues when replacing an original OE hub

Installation Notes and Quality Assurance

Verify year, make, model, and position before installation. Confirm axle nut requirements for the specific vehicle listing, since the included hardware note differs by application. Use OE service procedures and torque specifications during installation to protect bearing and hub life.

InMotion manufactures this wheel hub under strict quality-control criteria and uses OE data and measurements to support correct fitment and consistent performance.